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  Intelligence - Handling and Use of Japanese Naval Sigint during and after the outbreak...

  Intelligence - Handling and Use of Japanese Naval Sigint during and after the outbreak of hostilities with the Japanese and during Colombo air attacks, Spring 1942. Notes on the use of Sigint during the Japanese attacks on Hong Kong, Malaya and Singa…

  Held by

  The National Archives, Kew

  Date

  1939 Jul 07 - 1942 May 25

  Reference

  HW 50/59

• Catalogue level

  Piece

  Gp Capt Winterbotham of HQ to EWT Jan 2 re Sigint conference at Honolulu and dissemination...

  DMI and ACAS (I) in BP Ardennes' report and Sigint interpretation failures, to be presented to 4 named US Generals, EWT to O'Connor Jan 13 with his comments on those of DMI and ACAS (I); Sigs 4 to BP Jan 3 re visit by LT Col Wallace of BP to WO Oct 2…

  Held by

  The National Archives, Kew

  Date

  1945 Jan 1-15

  Reference

  HW 14/119

• Catalogue level

  Piece

  Traffic analysis report on Japanese army communications

  Traffic analysis report on Japanese army communications

  Held by

  The National Archives, Kew

  Date

  1945 Sep 25 - 1945 Oct 16

  Reference

  HW 41/334

• Catalogue level

  Piece

  Teleprinted translations of decrypted Second World War German U-boat (or U-boat command)...

  Subject: U-boat group/Ubootgruppe Leuthen (Leithen), convoy ON202 (1943 Sep 15 - 1943 Sep 25). Subject: U-boat group/Ubootgruppe Rossbach (1943 Sep 24 - 1943 Oct 13).

  Held by

  The National Archives, Kew

  Date

  1943 Sep 2-1944 Dec 30

  Reference

  HW 18/268

• Catalogue level

  Piece

  North Africa: Rommel's reply Nov 26 to Cavallero's request for a detailed investigation...

  Cavallero's request for a detailed investigation into withdrawal of Italian infantry if Allies break through at Marsa El Brega, Rommel considers task impossible unless Italians provide 500 vehicles Rommel's reply, 26 Nov to Bastico's message of Nov 2…

  Held by

  The National Archives, Kew

  Date

  1942 Nov 28

  Reference

  HW 1/1171

• Catalogue level

  Piece

  Teleprinted translations of decrypted Second World War German U-boat (or U-boat command)...

  Subject: Duala, Wohnschiff Pillau (1942 Jun 5 - 1942 Jun 25).

  Held by

  The National Archives, Kew

  Date

  1942 Mar 01-1944 Jun 30

  Reference

  HW 18/249

• Catalogue level

  Piece

  Teleprinted translations of decrypted Second World War German U-boat (or U-boat command)...

  Subject: U-boat group/Ubootgruppe Seeräuber (Seeraeuber, Pt 1), convoy RS3 (1943 Mar 25 - 1943 Mar 28).Subject: U-boat group/Ubootgruppe Ostmark (Pt 2) and Westmark (Pt 2), convoy SC121 (1943 Mar 6 - 1943 Mar 7).

  Held by

  The National Archives, Kew

  Date

  1943 Feb 23-1943 Mar 1

  Reference

  HW 18/257

• Catalogue level

  Piece

  EWT's 4 pages of comments on DMI's letter of Jan 29 to Chairman of Y Board on way...

  Jan 29 to Chairman of Y Board on way forward for UK Sigint, paper by EWT on control of static Sigint stations by GCCS Feb 23; AD (S) to C with two BP reports on Abwehr recce unit operations in North Africa, featuring Von Griesheim and and Felmy Feb 2…

  Held by

  The National Archives, Kew

  Date

  1943 Feb 21-28

  Reference

  HW 14/68

• Catalogue level

  Piece

  North Africa: summary of GAF and 90th Light Division activities July 3; intentions...

  Japanese ambassador, Berlin reports discussion with Ribbentrop on policy towards India, June 25. Spanish minister, Ankara, relays Polish report on military situation in Middle East, June 30.

  Held by

  The National Archives, Kew

  Date

  1942 July 4

  Reference

  HW 1/697

• Catalogue level

  Piece

  South Europe: GAF final report for Oct 25; 14th Panzer Corps report, Oct 25; 15th...

  dams in Italy, Oct 25.

  Held by

  The National Archives, Kew

  Date

  1943 Oct 27

  Reference

  HW 1/2169

• Catalogue level

  Piece

  Teleprinted translations of decrypted Second World War German U-boat (or U-boat command)...

  Subject: U-boat group/Ubootgruppe Monsun (Pt 1) (1943 May 2 - 1943 May 25).

  Held by

  The National Archives, Kew

  Date

  1943 Mar 13-1943 Aug 18

  Reference

  HW 18/259

• Catalogue level

  Piece

  C to EWT July 28 re activities of British Naval Attache Stockholm, EWT to arrange...

  Williams July 28 requesting report by mid-Sept; EWT to 21 AG July 17 re routeing of Ultra, reply July 18; Barker at SLU 21 AG re SLU service to Europe July 26, visiting UK July 28, wishes to discuss future of SLU 8; Col Scott at 21 AG to DD (Y) July …

  Held by

  The National Archives, Kew

  Date

  1945 July 16-31

  Reference

  HW 14/132

• Catalogue level

  Piece

  C's approval for suggestion by Marchant of Hut 3 that reporting on POW camps in W...

  French, Scott to Wilson Apr 14 requesting details of UK team to visit Continent to discuss French problem, Scott going to 21 AG for 3 days, team to meet with Maj Gen Strong Apr 23, Wilson to Scott Apr 14, Wilson has to go to Washington on or about Ap…

  Held by

  The National Archives, Kew

  Date

  1945 Apr 1-15

  Reference

  HW 14/125

• Catalogue level

  Piece

  France: German orbat for south coast of France, Nov 26. North Africa: combat situation...

  North Africa: Kesselring to Nehring at Tunis on Nov 25 referring to Hitler's suggestion that use of Tiger tanks would turn tide of battle in Germans' favour.

  Held by

  The National Archives, Kew

  Date

  1942 Nov 28

  Reference

  HW 1/1169

• Catalogue level

  Piece

  Fighting in Poltava-Kharkov area Sept 28. Dniepropetrovsk bridgehead being extended...

  Possible test of submarine cable between Italy and Libya Sept 25.

  Held by

  The National Archives, Kew

  Date

  1941 Sept 29

  Reference

  HW 1/98

• Catalogue level

  Piece

  499-1500: mainly reports of shipping movements. 1-498 missing at transfer.[Many messages...

  499-1500: mainly reports of shipping movements. 1-498 missing at transfer.[Many messages are misplaced or have duplicate numbers.] Numbers 726, 778, 843-844, 866, 921, 1114, 1268?, 1330 and 1414 appear to be missing at transfer. 780 after 777 should …

  Held by

  The National Archives, Kew

  Date

  1941 Sep 25-1942 Aug 09

  Reference

  HW 19/278

• Catalogue level

  Piece

  Teleprinted translations of decrypted Second World War German U-boat (or U-boat command)...

  Subject: torpedo problems and torpedo handling (1941 Feb 25 - 1942 Jan 30). Subject: rules of attack (1941 Jun 4 - 1941 Jun 28). Subject: provisioning U-boats by tanker Lothringen (1941 Jun 4 - 1941 Jun 12).

  Held by

  The National Archives, Kew

  Date

  1941 Feb 2-1942 Aug 17

  Reference

  HW 18/243

• Catalogue level

  Piece

  North Africa: Tunis Air Corps and 5th Panzer Army detailed combat plans for Feb 26,...

  at Gafsa airfield, Feb 25.

  Held by

  The National Archives, Kew

  Date

  1943 Feb 26

  Reference

  HW 1/1404

• Catalogue level

  Piece

  Naval Miscellaneous Papers September-December 1943 These papers collected by Frank...

  25/12/1943 JN.25 Development of work by GC&CS on this system. 28/12/1943 Build-up of Signals Intelligence Unit, Colombo from C. in C., Eastern Fleet.

  Held by

  The National Archives, Kew

  Date

  1943 Sep 01-1943 Dec 31

  Reference

  HW 8/29

• Catalogue level

  Piece

  Traffic analysis report on Japanese army communications

  Traffic analysis report on Japanese army communications

  Held by

  The National Archives, Kew

  Date

  1945 Sep 25 - 1945 Oct 06

  Reference

  HW 41/333